Volume 77, Number 6, March 2007
Article Number 69001
Number of page(s) 5
Section Geophysics, Astronomy and Astrophysics
Published online 02 March 2007
EPL, 77 (2007) 69001
DOI: 10.1209/0295-5075/77/69001

Rate- and state-dependent friction law and statistical properties of earthquakes

A. Ohmura and H. Kawamura

Department of Earth and Space Science, Faculty of Science, Osaka University - Toyonaka 560-0043, Japan

received 6 November 2006; accepted in final form 2 February 2007; published March 2007
published online 2 March 2007

In order to clarify how the statistical properties of earthquakes depend on the constitutive law characterizing the stick-slip dynamics, we make an extensive numerical simulation of the one-dimensional spring-block model with a rate- and state-dependent friction law. Both the magnitude distribution and the recurrence-time distribution are studied with varying the constitutive parameters characterizing the model. While a continuous spectrum of seismic events from smaller to larger magnitudes is obtained, earthquakes described by this model turn out to possess pronounced "characteristic" features.

91.30.Ab - Theory and modeling, computational seismology.

© Europhysics Letters Association 2007